The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 12, 1999
Filed:
Jul. 17, 1997
Applicant:
Inventors:
Keiji Uemura, Tokyo, JP;
Hirotake Shigemi, Tokyo, JP;
Assignee:
Kurita Water Industries Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
21032175 ; 21032176 ; 21032184 ; 21032185 ; 2104934 ; 2104971 ;
Abstract
A spiral wound type membrane module is formed by winding membranes onto a shaft by way of outer spacers. An inner spacer is inserted into the membrane. Raw water is fed from one end of a membrane roll into channels between the membranes. The raw water flows in a direction substantially parallel to the axis of the roll and is taken out from the other end of the roll as nonpermeated water. Water permeated through the membranes flows in the membranes spirally in the winding direction and is taken out from the opening formed on the circumference of the roll.